Query time 0.00076
JSON explain
{
"query_block": {
"select_id": 1,
"cost_info": {
"query_cost": "2.86"
},
"nested_loop": [
{
"table": {
"table_name": "pfv",
"access_type": "ref",
"possible_keys": [
"PRIMARY",
"fl",
"variant_id",
"lang_code",
"product_id",
"fpl"
],
"key": "PRIMARY",
"used_key_parts": [
"feature_id",
"product_id"
],
"key_length": "6",
"ref": [
"const",
"const"
],
"rows_examined_per_scan": 2,
"rows_produced_per_join": 1,
"filtered": "56.37",
"using_index": true,
"cost_info": {
"read_cost": "1.04",
"eval_cost": "0.23",
"prefix_cost": "1.44",
"data_read_per_join": "892"
},
"used_columns": [
"feature_id",
"product_id",
"variant_id",
"lang_code"
],
"attached_condition": "(`portal`.`pfv`.`lang_code` = 'en')"
}
},
{
"table": {
"table_name": "fv",
"access_type": "eq_ref",
"possible_keys": [
"PRIMARY",
"feature_id"
],
"key": "PRIMARY",
"used_key_parts": [
"variant_id"
],
"key_length": "3",
"ref": [
"portal.pfv.variant_id"
],
"rows_examined_per_scan": 1,
"rows_produced_per_join": 0,
"filtered": "5.00",
"cost_info": {
"read_cost": "1.13",
"eval_cost": "0.01",
"prefix_cost": "2.79",
"data_read_per_join": "65"
},
"used_columns": [
"variant_id",
"feature_id",
"position"
],
"attached_condition": "(`portal`.`fv`.`feature_id` = 71)"
}
},
{
"table": {
"table_name": "fvd",
"access_type": "eq_ref",
"possible_keys": [
"PRIMARY"
],
"key": "PRIMARY",
"used_key_parts": [
"variant_id",
"lang_code"
],
"key_length": "9",
"ref": [
"portal.pfv.variant_id",
"const"
],
"rows_examined_per_scan": 1,
"rows_produced_per_join": 0,
"filtered": "100.00",
"cost_info": {
"read_cost": "0.06",
"eval_cost": "0.01",
"prefix_cost": "2.86",
"data_read_per_join": "174"
},
"used_columns": [
"variant_id",
"variant",
"lang_code"
]
}
}
]
}
}
Result
feature_id |
product_id |
variant_id |
position |
variant |
71 |
36750 |
9782 |
0 |
50ml |